.chat-box {
    max-width: 100%;
    --bs-bg-opacity: .2;
    color: black !important;
}
.chat-box img {
    max-width: 100%;
    height: auto;
    display: block;
    padding: 10px;
}
.chat-box iframe {
    max-width: 100%;
    height: auto;
    display: block;
    padding: 10px;
}
#messages {
    height: 40vh;
    font-size: 18px;
}
#messages::selection,
#messages *::selection {
    background-color: lightblue;
}
.user-choice:hover {
    background-color: #eeeeee !important;
}